A.J. Sobey and J.W. Cone of Transportation Technology Incorporated wrote a report titled "The Case for Personal Rapid Transit," which was printed in the Highway Research Record No.367. As an advocate for personal rapid transit, vehicles that held one or only a few people, Sobey and his company, Transportation Technology Incorporated studied public transportation needs in various cities, including Los Angeles. Communication with a Southern California Rapid Transit District (SCRTD) Employee, an SCRTD report, and a public transportation report written by Cloverdale and Colpitts all influenced Transportation Technology Incorporated. All of these reports are available at the LACMTA Library & Archive.